Device for mechanically regulating feed mechanism.



BFM. W. HANSON.

DEVICE FOR MECHANIGALLY REGULATING FEED MECHANISM.

APPLICATION FILED APB.12.1907.

Patented Jan. 19. 1909.

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Witnesses UNITED STATES PATENT oEEioE.

BENGT M. W. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT &WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed April 12, 1907. Serial No. 367,855.

To all whom it may concern:

Be it known that'I, BENGT M. W. HAN- son, a citizen of Sweden, residingat Hartford, in the county of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in Devices for MechanicallyRegulating Feed Mechanism, of which the following is a specification.

This invention relates to mechanical regulating and throw-off devicesfor feed-mechanism, and while designed for use with metal-grinding orreducing machines, is limited to no specific art.

Frequently it is necessary either to increase or to decrease theamplitude of oscillation of a pawl cooperating with a ratchet-wheelfixed to a shaft controlling the feed-mechanism, and the object of myinvention is the provision of devices for accomplishing this result inan accurate manner and also for stopping the mot-ion of the feed at apredetermined point.

Other objects of the invention will be set forth in the followingdescription.

In the accompanying drawings, Figure 1 is a front view of theimprovement showing one" stage of the operation; Fig. 2 is a similarview illustrating the parts in difierent positions; and Fig. 3 is adetail view hereinafter described.

Like numerals designate similar parts throughout the several views.

Referring to the drawings, the numeral 1 designates a shaft controllingfeed-mechanism of any desired kind, and 2 a ratchetwheel rigid with saidshaft.

Sleeved on shaft 1, or on the hub of ratchet-wheel 2, is an arm 3 havinga lateral extension 4, and pivoted at 5 to the upper part of the arm isa pawl 6 having a tooth 7 normally in engagement with the teeth of theratchet-wheel, and provided with a handle 8 by which it may be lifted tofree said engagement at any required time. On the inner surface of thearm is a stud or wrist-pin 9, working in a slot 10 of a pitman 11, whichmay be actuated in any desired manner.

Designated by 21 is a plate which may be secured to the frame of themachine with which the feed-mechanism is employed by screws 23. In a lug24 of said plate is threaded a screw 25 having a knurled head 25, and ajam-nut 26 the point of said screw being located beneath the extensionof arm 3. Pivoted at 27 to the plate 21 is a lever 28, the free end ofwhich is bifurcated at 28 to provide clearance for plate 3, and mountedin a chamber of the plate 21 is a rod 29 in engagement at its inner endwith said arm 28, and at its outer end with an arm 30 of an angle-leverpivoted at 31 to the plate, and having a latch 32 projecting inwardly,and adapted to engage a catch 33, as will be hereinafter described.

Designated by 34 is a lever pivoted on a stud 35, and having an arm 37connected by a spring 38 with a stud 39 of the plate 21. In a head 40 ofthe lever 34 is adjustably fitted a pin 41 projecting from a screw 42having a knurled manipulating-head 43, and locked in place by a jam-nut44,the amplitude of oscillation of said lever being limited by stops 45,45 on said plate 21.

To the hub of the ratchet-wheel 2 is frictionally fitted an arm 12having a T-head 7 to which the shoe 20 is ivoted. Normally therefore thearm 12 w1ll turn with said ratchet-wheel although by virtue of itsconnection therewith it is capable of adjustment so as to regulate thetime at which the shoe 20 will lift the pawl 6 to throw the latter outof action. The arm 17 is loosely carried by the hub of the arm 12 and istherefore adjustable being held in an adjusted position by a detent as16 carried by the T-head 7 and adapted to engage the teeth of the rack18 extending laterally from the arm 17. This arm 17 therefore is capable of rotating with the ratchet-wheel 2 and serves as a means forefiecting, through intermediate means, a shortening in stroke of theoscillatory member 3.

In the operation of the invention, the pitman 11 is reciprocated by anydesired mechanism, and is limited at the end of its stroke by the wallsof the slot 10 engaging the pin 9 of the arm 3. As said pitman movesforward it will oscillate the arm 3 and cause the tooth 7 of pawl 6pivoted to the arm to engage the teeth of ratchet-wheel 2, and toadvance said ratchet-wheel and the shaft 1 to which it is connected. Assaid ratchet-wheel advances, arms 12 and 17 will move with saidratchet-wheel and after end of pivoted lever 28, will force said endinward and drive the rod 29 backward, thereby tripping the latch. 32,-and permitting the spring 38 to throw the lever 3a 111- ward, and causethe adjustable point if to pass beneath the extension tof the swingingarm 3, thereby limiting the amplitude of oscillation of said arm 3, andshortening the feed-stroke of the mechanism. As the ratchet-wheel movesforward after this con dition has arisen, a slow feed will take placefor a certain number of teeth dependent upon the adjusted position ofthe shoe 20, and when said shoe comes beneath. the tooth 7 of pawl 6 itwill raise said pawl, and disconnect the same from the teeth of theratchet-wheel 2. In this way any desired feed adjustment may beobtained, and either a coarse or fine feed may be readily accomplished,the control of said feed being read ily effected by the means described.

Changes may be made in various parts of the mechanism, without departurefrom the invention.

Having thus described the invention, what I claim is:

1. The combination, with a ratchet-wheel, of a movable arm; a pawlcarried by said arm, and adapted to engage the ratchet wheel; means foractuating the arm; a device adapted to be thrown under an extension ofthe. arm to limit the movement of said arm; a latch for said device; andmeans controlled by the ratchet-wheel for tripping said latch.

2. The combination, wit-h a shaft, and with a ratchet wheel rigidtherewith, of an arm ocil-latory about said shaft, said arm having anextension; a pawl carried by the arm; a shoe for releasing the pawl at apredetermined point; and means to engage said extension, for varying theamplitude of oscillation of the arm.

3. The combination, with a shaft, and

with a ratchet-wheel carried thereby, of an arm movable around theshaft; means for oscillating said arm; a pawl carried by the arm; a shoefor releasing the pawl; an extension rigid with the arm; and meansadapted to be thrown beneath the extension, and serving to limit theoscillation of said arm.

4. The combination, with a shaft, and with an arm sleeved thereon, saidarm having an extension, of a ratchet-wheel connected with the shaft; ashoe for releasing the pawl; means for oscillating the arm; and anadjustable device beneath the extension for limiting the stroke of saidarm.

5. The combination, with a shaft, and with a ratchet-wheel rigidtherewith, of an arm sleeved upon the shaft, and having an extension; apawl carried by the arm, and in engagement with the teeth of theratchetwheel; a device adjustable upon the shaft,

and having a rack; a device carried by the 1 ratchet-wheel, and having ashoe; a detent carried by sald. devlce, and. 1n. engagement with therack; a frame; a movable rod on said frame; a latch adapted to betripped by the rod; a cam for tripping the latch; a lever pivoted to theframe; and means carried by the lever for engaging the arm.

6. The combination of a ratchet-Wheel, a pawl for operating saidratchet-wheel, an oscillatory member carrying said pawl, a shiftabledevice normally held against movement, and mechanism operable bysaidbetween the teeth of the ratchet wheel and the pawl, andautomatically-operative mechanism controlled by the ratchet-wheel forlimiting the movement of the pawl and for also moving the said shoebetween said teeth the said pawl to stop the ratchet-wheel.

8. The combination of a ratchet-wheel, an oscillatory member, a pawlcarried by said oscillatory member, for operating said ratchet-wheel,automatically-operative mechanism for limiting the amount of stroke ofsaid member, and an automatically-operable shoe movable into positionbetween the teeth of theratchet wheel and pawl to throw the latter outof action.

9; The combination of aratchet'-- wheel, an oscillatory member, a pawlcarried by said oscillatory member, for operating said ratchet wheel, anautomatically operative device, a latch for holding saidautomaticallyoperative device normally against movement, and means fortripping said latch to release said automatically operative device thelatter when released serving to vary the stroke of said oscillatorymember- 10. The combination of a ratchet-wheel, a. pawl for operatingsaid ratchet-wheel, a movable device for carrying said pawl, anautomatically shiftable device, a latch for normally holding saidautomaticallyshiftable device against movement, means movable with theratchet-wheel for tripping said latch to thereby release saidautomati'cally-shiftable device, the latter when released being movableinto position to vary the movement. of said movable device, and meansalso movable with said ratchet-wheel for throwing the pawl out ofaction.

In testimony whereof I afliX my signature in. presence of two witnesses.

BENGT W. HANSON,

Witnesses FRANCES E. BLODGETT, F. E. ANDERSON.

